search for: vakken

...m what I have read, the trouble with running an unbalanced two-way ANOVA, is that things get tricky when calculating the sum of squares for two factors and the interaction term. *What I am stuck on:* So far what I have done is applied my data to this helpful tutorial: http://www.biw.kuleuven.be/vakken/statisticsbyr/ANOVAbyRr/UnbalancedTwoWayANOVA.htm I found that my interaction term was insignificant, so my model was reduced to a two-factor model. But then I got stuck on the part where I use a general linear test (GLT) to determine whether I should use a two- or one- factor model to get my...

...rison tests as in SPSS with R? I am specially interested in Tukey's B test. I have tried to find the answer myself and found an excellent description here: http://www.ppsw.rug.nl/~sda/siv/Posthoc_print.pdf (-> Tab. 2) Together with the information here ... http://www.agr.kuleuven.ac.be/vakken/statisticsbyR/ANOVAbyRr/multiplecomp.htm (Differences between Brands are significant at 5% level if the confidence interval around the estimation of the difference does not contain zero.) .. I am already able to figure out the subsets "manually". But for larger groups the risk to mak...

hi list, i have to ask you again, having tried and searched for several days... i want to do a TukeyHSD after an Anova, and want to get the adjusted p-values after the Tukey Correction. i found the p.adjust function, but it can only correct for "holm", "hochberg", bonferroni", but not "Tukey". Is it not possbile to get adjusted p-values after